I'd go with an A myself. I've had two of each, and the legroom in a C isn't much and you still have to get in around the engine. One advantage in a C is a drivers door but I have that in my A also. An A is limited usually to a 14,500# weight and most A's are over 20,000 so you don't have to worry about being overloaded. Fixtures and trim is better on most A's because they don't have the weight issue to worry about. If you're talking about children, that makes the choice different-you may require the overhead on an A regardless of other factors.